The Brookings Institutions Center on Urban & Metropolitan Policy report finds that a leading indicator of a metropolitan areas high technology success is a large gay population. Using four indices, 1990 census data, and the Milken Institute’s measures of high-tech concentration, the new analysis revealed other indications of diversity, such as a high concentration of artists or foreign-born residents, are additional significant indicators of successful technology centers.
Link
http://www.brookings.edu/es/urban/techtol.pdf